Swivel chair



FIG. 1 is a front elevational view of a swivel chair, showing my new design;

FIG. 2 is a rear elevational view of a swivel chair, showing my new design;

FIG. 3 is a left-side view of a swivel chair, showing my new design;

FIG. 4 is a right-side view of a swivel chair, showing my new design;

FIG. 5 is a top plan view of a swivel chair, showing my new design;

FIG. 6 is a bottom plan view of a swivel chair, showing my new design;

FIG. 7 is a perspective view of a swivel chair, showing my new design; and,

FIG. 8 is another perspective view of a swivel chair, showing my new design. 

CLAIM I claim the ornamental design for a swivel chair, as shown and described. 